Hi there, Welcome to HCM, Dermoid cysts are benign cyst and not cancerous, but you need to remove them, as you have 2 but also because their size is quite large. The main concern with dermoids is they may twist causing their blood supply to be hampered which can cause further pain and ovarian problems. Also the diagnosis of dermoid which at present is made on ultrasound needs to be confirmed by the pathologist, this could be something else other than dermoid as well, and only histopathology after surgical removal of cyst can confirm it. I am afraid surgery is the only option medicines will not increase or decrease their size. Surgery can be open or laparoscopic, its best that you have a discussion about the same with your gynaecologist. Hope this helps. regards.